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Hydrogeologic investigations of the Bruneau sewage lagoons, Bruneau, Idaho
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Chemical and physical changes due to water 921046 Filtration characteristics of geotextiles Subrahmanyam, G; Ali, M Proc Indian Geotechn&al Conference, 1989, Geotechniques o f Problematic Soils and Rocks, Visakhapatnam, 14-16 December 1989 VI, P299-301. Publ New Delhi: Sarita Prakashan, 1989
impact on foundations are discussed, including soil improvement, drainage, and flow restriction. A series of case studies describing drainage, grouting, and flow mitigation is presented.
Measurement of water pressure and its effects
One of the many applications for geotextiles is as filter materials in earth or rock structures. The textile must allow free passage of water but retain soil particles. Soil retentivity and effective permeability respectively control upper and lower limits of permissible pore size. A simple apparatus to measure amount of fines washed through a geotextile is illustrated. Initial results on an available geotextile, 2ram thick nonwoven polypropylene, suggest it is a suitable filter material.
921050 Hydrogeologic investigations of the Bruneau sewage lagoons, Bruneau, Idaho Hunter, P K; Noble, R A; Narkiewicz, S A Proc 1990 Annual Symposium on Geology and Geotechnical Engineering, Instrumentation and Computer Applications, Pocatello, 4-6 April 1990 P21.1-21.16. Publ Pocatello: Idaho State University, 1990
92 ! 047 Geochemical aspects of the geological medium changes in coalfields Maximovich, N G; Gorbunova, K A Proc 6th International Congress International Association o f Engineering Geology, Amsterdam, 6-10 August 1990 V2, P1457-1461. Publ Rotterdam." A A Balkema, 1990
Following the failure of the edge of one of the Bruneau lagoons, eighteen static piezometers were installed to monitor water level during the irrigation season and to provide samples for analysis. 3-6m of recent alluvial deposits overlie I-3m of gravel then Glenn Ferry Formation siltstone at the site. Results indicate the area is one of groundwater discharge, due to the shallow groundwater system, and irrigation return flow. Slope slumping and observed lifting of the membrane liner of the failed cell were attributed to high hydrostatic pressure exerted by groundwater flow. Drainage installation is suggested as a remedial measure.
Processes contained within sulphur bearing coal formations may lead to production of sulphuric acid and affect the geological medium and engineering materials. The geochemical processes are usually activated during the mining process by the flow of ground and surface waters, or underground and surface atmospheres. The studies conducted in the Kiezel coal basin indicate that negative effects to the geological medium due to coal mining can be reduced by creating a man-made geochemical barrier.
921048 Research in mechanism, prediction and remediation for karst collapse of ground soil Chen Guoliang; Chen Yuchang; Tan Hongzeng Proc 6th International Congress International Association o f Engineering Geology, Amsterdam, 6-10 August 1990 I/3, P1535-1541. Publ Rotterdam: A A Balkema, 1990 Karst collapses in China have severely disrupted railways and mining. To improve understanding of the nature and mechanism of karst collapse, a combination of field observations and pumping tests plus laboratory physical model simulations was used. The difference in hydraulic pressure transmitted through the karst pipes during water table fluctuation is taken to be the primary cause of collapse. Qualitative and quantitative prediction methods are developed and a variety of remedial measures suggested.
921049 Ground water impact on foundations in urban areas Anagnosti, P Proc Ninth Danube-European Conference on Soil Mechanics and Foundation Engineering, Budapest, 2-5 October 1990 P317. Publ Budapest: Akademiai Kiado, 1990 An overview is presented with reference to the plain of the Danube river. Groundwater can cause uplift or changes in soil properties (swelling, collapse) and flow may lead to erosion or piping or seepage forces. Methods to control groundwater
921051 Role of pore water in geological and geotechnical engineering Barends, F B J eroc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V2, P1321-1326. Publ Rotterdam. A A Balkema, 1990 Evaluation of geomechanical processes is often made difficult by incomplete knowledge of geological structures and spatial variability of material properties. An approach using an easily measurable field variable, the pore pressure, for observation of geomechanical processes is proposed. Pore pressure response and its change with time are used to infer the causes of the change. Applications are described to interpretation of pumping tests, dam design, land reclamation, subsidence,and reservoir management.
921052 Land subsidence in Las Vegas, Nevada, USA Bell, J W Proc 6th International Congress International Association o f Engineering Geology, Amsterdam, 6-10 August 1990 V2, P1327-1332. Publ Rotterdam: A A Balkema, 1990 Since 1955, annual abstraction of groundwater from around Las Vegas has been at about twice rate of recharge. Fall of the water table and reduction of artesian water pressure have led to compaction of underlying fine grained sediments. Geodetic monitoring indicates subsidence as great as 1.5m has occurred in the centre of the valley. On a local scale, subsidence is focused on existing faults which act as planes of weakness for ground movement and fissuring. Movements of up to 60mm/year have been recorded, which lead to structural damage. A new GPS benchmark system has been installed to allow accurate monitoring of surface movement.
© 1992 Pergamon Press pie. Reproduction not permitted
Chemical and physical changes due to water 921046 Filtration characteristics of geotextiles Subrahmanyam, G; Ali, M Proc Indian Geotechn&al Conference, 1989, Geotechniques o f Problematic Soils and Rocks, Visakhapatnam, 14-16 December 1989 VI, P299-301. Publ New Delhi: Sarita Prakashan, 1989
impact on foundations are discussed, including soil improvement, drainage, and flow restriction. A series of case studies describing drainage, grouting, and flow mitigation is presented.
Measurement of water pressure and its effects
One of the many applications for geotextiles is as filter materials in earth or rock structures. The textile must allow free passage of water but retain soil particles. Soil retentivity and effective permeability respectively control upper and lower limits of permissible pore size. A simple apparatus to measure amount of fines washed through a geotextile is illustrated. Initial results on an available geotextile, 2ram thick nonwoven polypropylene, suggest it is a suitable filter material.
921050 Hydrogeologic investigations of the Bruneau sewage lagoons, Bruneau, Idaho Hunter, P K; Noble, R A; Narkiewicz, S A Proc 1990 Annual Symposium on Geology and Geotechnical Engineering, Instrumentation and Computer Applications, Pocatello, 4-6 April 1990 P21.1-21.16. Publ Pocatello: Idaho State University, 1990
92 ! 047 Geochemical aspects of the geological medium changes in coalfields Maximovich, N G; Gorbunova, K A Proc 6th International Congress International Association o f Engineering Geology, Amsterdam, 6-10 August 1990 V2, P1457-1461. Publ Rotterdam." A A Balkema, 1990
Following the failure of the edge of one of the Bruneau lagoons, eighteen static piezometers were installed to monitor water level during the irrigation season and to provide samples for analysis. 3-6m of recent alluvial deposits overlie I-3m of gravel then Glenn Ferry Formation siltstone at the site. Results indicate the area is one of groundwater discharge, due to the shallow groundwater system, and irrigation return flow. Slope slumping and observed lifting of the membrane liner of the failed cell were attributed to high hydrostatic pressure exerted by groundwater flow. Drainage installation is suggested as a remedial measure.
Processes contained within sulphur bearing coal formations may lead to production of sulphuric acid and affect the geological medium and engineering materials. The geochemical processes are usually activated during the mining process by the flow of ground and surface waters, or underground and surface atmospheres. The studies conducted in the Kiezel coal basin indicate that negative effects to the geological medium due to coal mining can be reduced by creating a man-made geochemical barrier.
921048 Research in mechanism, prediction and remediation for karst collapse of ground soil Chen Guoliang; Chen Yuchang; Tan Hongzeng Proc 6th International Congress International Association o f Engineering Geology, Amsterdam, 6-10 August 1990 I/3, P1535-1541. Publ Rotterdam: A A Balkema, 1990 Karst collapses in China have severely disrupted railways and mining. To improve understanding of the nature and mechanism of karst collapse, a combination of field observations and pumping tests plus laboratory physical model simulations was used. The difference in hydraulic pressure transmitted through the karst pipes during water table fluctuation is taken to be the primary cause of collapse. Qualitative and quantitative prediction methods are developed and a variety of remedial measures suggested.
921049 Ground water impact on foundations in urban areas Anagnosti, P Proc Ninth Danube-European Conference on Soil Mechanics and Foundation Engineering, Budapest, 2-5 October 1990 P317. Publ Budapest: Akademiai Kiado, 1990 An overview is presented with reference to the plain of the Danube river. Groundwater can cause uplift or changes in soil properties (swelling, collapse) and flow may lead to erosion or piping or seepage forces. Methods to control groundwater
921051 Role of pore water in geological and geotechnical engineering Barends, F B J eroc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V2, P1321-1326. Publ Rotterdam. A A Balkema, 1990 Evaluation of geomechanical processes is often made difficult by incomplete knowledge of geological structures and spatial variability of material properties. An approach using an easily measurable field variable, the pore pressure, for observation of geomechanical processes is proposed. Pore pressure response and its change with time are used to infer the causes of the change. Applications are described to interpretation of pumping tests, dam design, land reclamation, subsidence,and reservoir management.
921052 Land subsidence in Las Vegas, Nevada, USA Bell, J W Proc 6th International Congress International Association o f Engineering Geology, Amsterdam, 6-10 August 1990 V2, P1327-1332. Publ Rotterdam: A A Balkema, 1990 Since 1955, annual abstraction of groundwater from around Las Vegas has been at about twice rate of recharge. Fall of the water table and reduction of artesian water pressure have led to compaction of underlying fine grained sediments. Geodetic monitoring indicates subsidence as great as 1.5m has occurred in the centre of the valley. On a local scale, subsidence is focused on existing faults which act as planes of weakness for ground movement and fissuring. Movements of up to 60mm/year have been recorded, which lead to structural damage. A new GPS benchmark system has been installed to allow accurate monitoring of surface movement.
© 1992 Pergamon Press pie. Reproduction not permitted